The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 1978
Filed:
Jun. 23, 1976
Nickolas N Sokolow, Cheshire, MA (US);
Beloit Corporation, Beloit, WI (US);
Abstract
An improvement is provided for plastic molding machinery of the type comprising a plastic melt injection apparatus and a mold. A shut-off valve which provides communication between the injection apparatus and the mold, includes a single elongate passageway and an elongate shut-off piston oriented generally parallel to the flow path and mounted in the passageway by a housing, which housing is supported by a single, streamlined leg so that the plastic melt flows therethrough in a single, undivided flow path. The melt flow path, as defined by the passageway and housing mounted therein has a generally circular transverse cross-section at an upstream station and a generally U-shaped transverse cross-section at a station downstream of the circular station. An aspect of the improvement is a plug-shaped tip formed integrally on the downstream end of the piston for expelling residue and cleaning the outlet port especially in structural foam molding applications. A further aspect of the improvement is an elongate nozzle for molding applications with larger molder sizes that require an extra long injection reach.